Time controlled system



Nov. 9, 1937. E. B. JACKSON TIME CONTROLLED SYSTEM Filed Oct. 15, 1934.lllllllllR l I l II Patented Nov. 9, 1937 UNITED I STATES PATENT vOFFICE TIME oou'momzsn SYSTEM Application @ctcher 15 1934, Serial No348,314

'"wention relates in general to time s s and more particularl tosyslurality of secondary apparaand controlled by a and in' which eachsecondary odic'ally corrected. and s inchro aster clock.

' of the invention is to cove type which is e2 e and which requires 0toses are e or master a oataws "crevice k n each secondaz;

o open the to the secondary mined chronological re oi the inventionrelau 1e above device is current is main g the synchroz" rative suchsecondary stopped in the ore o a d other objects am. specificaliymentioned move rstood from a perusal of :1 when read in connect;

lo the accoz of the invention; and emetic diagram showing a medi .einvention.

o the drawing in detail, the master hown in Fig. 1 comprises an" usualnute impulse contact device *3 for suitahie sending out the usual minuteimpulses to the secondary; usual or suitable corrective rapid impulsecontact device 2 for periodically sending out a series of rapid impulsesto the secondary apparatus, (for example, one every two seconds over aperiod of thirty seconds) a contact device 3 controlled by masterapparatus time for periodically cutting in ancient the rapid impuise contact device 2 (for example, from fifty-nine minutes and fifteen secondsto fiftg nine minutes and forty-five seconds) a reiay t to controllingall of the impulses se t out by the master apparaa resistance 5 fenabling a con lnuous weak eurcent to he ed periodical y to Zine theaster app etoe to the secondary ap master J- -e mm a contacts 2 theconductor t8, the weak coherent suonty resistance conductor through thecam-wont out contacts 22 conductor 23, resistance and conductor N to theconductor leading to the secondary apparatus.

The circuit controlling device fit of the secondary anoaratus of Fig. 1comprises a reckahle line conductor 32.

and a spring dog it! pivotally mounted on an aim. 3b which carries thearmature ill for the driving magnet l. This pivoted spring dog 29 isnormally prevented from engaging the actuating arm it of the contact 26by means of a circular disc 32 on the shaft 33 of the driven ratchet 36but is enabled to engage this actuating arm in a certain position of thesecondary apparatus when the notch 35 in the circular disc 32 comesopposite the pin 36 on the pivoted dog flll. In this position. the pinon the pivoted dog enters the notch Elli on the circular disc and in sodo-= ing engages the end of the actuating arm 2'1], opening the circuitfor the drive magnet l and closing the circuit for the weak currentmagnet The circuits for the secondary apparatus of Fig. l comprise acircuit for the driving magnet l and a circuit for the small weakcurrent magnet The circuit for the driving magnet l is from the lineconductor 25 through the conductor ill, oscillatable contact 2%, contact38, conductor magnet l and conductors till and (ll to the other Thecircuit for the weak current magnet ll is from the conductor 37!,through the contacts 26 and lll, conductor 36, magnet 9 and conductorill to the line conductor 62.

In operation, the repeating relay l is energized once each minute by themomentary closure of minute contact l, and atcontacts lli connects thebattery or other source of current it to the v conductors 2b and 32extending to the secondary These minute impulses pass through.

apparatus. the secondary magnets l and operate the associated apparatusstep by step.

Each time magnet l is energized, the dog rocks on its pivot lli, sincethe pin it strilres against the periphery of the disc When the secondaryapparatus is in position 5b, the notch 35 in disc 32 lies opposite the1 1. 1 36 on dog 29, so that when the next impulse energizes magnet 77,the pin it will enter the notch 3th.;

Referring now' to the master clock circuit, at approximately fiveminutes, or any other desired time, before the master clock reachesposition tt, contacts 2'22 are closed by cam ll, thereby connecting theresistance 5 across the 'impulsing contacts d5 of relay l. Theresistance t is made sumciently high so that the continuous currentwhich flows over the circuit during the synchro nizing period isinsufficient to interfere with the release of the secondary magnets l,but is sumcient to hold up the small relays t once they are operated.Contacts 22 are opened shortly before (for example, ten seconds) themaster clock sumed for the purpose of explanation only, does notinterfere with the regular advancing operations of the secondaryapparatus by the master clock. During this time, the regular minute im-=pulses and the fast accelerating impulses are sent out by the operationof relay l in theregular ltl manner. At each impulse contacts dd close,thereby connecting the full potential of the current source it to theline and bringing about the operation of the secondary magnets. Whenaceaecr the contacts open at the end of each impulse, the magnetsrelease since the current through resistance i5 is insumcient tomaintain them operated.

It will be assumed that the secondary apparatus S2 is fast and reachesposition bit before the master clock. When the next impulse is re'=ceived, magnet l operates and in this position the pin on the dog 29 canenter the notch in disc in doing so,.it mechanically operates thearmature ll of relay 9, thereby opening contacts and 2t andclosingcontacts 26 and 13. In order to make sure that the armature 3i willcomplete its movement, it may be desirable that the contacts and 26should not be opened until the contacts 26 and 53 are closed. For thispurpose the contacts 38, 2t and :33 may be of the make-before-brcaktype, the contact 38 being biased to follow downwardly with the contactit until the contacts'iti and 413 are closed, after which the contacts38 and 2b are opened by further movement of the contact 26. ing ofcontacts 38 and it opens the circuit of magnet l, allowing the magnet torelease and advance the secondary apparatus into position The closing ofcontacts 2t and d3 completes "the locking circuit for relay El and thisrelay is mains in position 5%.

Apparatus, such as St which is slow or on time will continue to beadvanced by the regular minute impulses and by the rapid acceleratingimpulses, if slow, received during the fifty-ninth minute. When Slreaches position W, the notch 35 in disc 32 will be opposite the pin 36on the dog 29. When the next impulse is received, contacts 38 and 26will be opened and contacts it and ltl closed. This opens the circuit tomagnet l, which releases and advances Si into position 59, and completesthe locking circuit to relay 9, which is held operated by the sustainedweak current. All the secondary apparatus is now held inoperative inposition 59.

Shortly before the master clock reaches position lit, contacts 22 areopened, removing resistance b from the circuit and cutting on the weal:current. Relays t accordingly release, opening their locking circuits atcontacts it and again preparing the impulsing circuits to magnets l atcontacts 38. When the master clock reaches position til, the regularminute impulse is transmitted to these magnets, advancing the secondaryapparatuses into position Eli and into synchronismwith the master clock.be stated that the pin 36 on the dog 29 can enter the notch 35 in thedisc 32 only when the magnet l is energized with the apparatus inposition 53. The relays therefore, cannot be again operated until thesucceeding synchronizing period.

It will be noted that the armatures of relays ii and the associatedcontacts are mechanically Y operated when magnets l are energized withthe secondary apparatuses in position 58. This construction necessitatesthe location of the relay in the secondary apparatus adjacent to themagnet so that the necessary mechanical connections can be made toefiect the above operation In some cases, the space maybe limited sothat the The open- It should relay cannot be placed adjacent to themagnet and the mechanical operation of the relay armature can'notreadilybe accomplished. The modiiication shown in Figure 2 of the drawing wasde- 5 signed for cases which space was limited as this modification"permits the placing of the relay anywhere in the secondary apparatusand, it necessary, outside of the apparatus altogether.

The principle operation of the circuit of m Figure 2 is practically thesame as that of Figure 1., The master clock; MI is identical in allrespects will the master clock M of Figure 1, The armat e levels 3!) ofthe secondary magnets l are c wded with cted dogs 28 which cooperatesame manner as the corres oohding parts Figure 1. The melmer ofoperating relays '5, ioweyer, is somewhat difierent. secondary apparatusof Fig. 2 comprises Li e driving mac-wet l, a ratchet and pawl mechsm 8driven 1 said driving magx iet, a small weal: c zrrent set 9 controlledby secondary time, "cable of holding armature under the influence of thecurrent from he master ctoc M to the co -gcl or the weak current ETOHLthe connector 55 through actor contacts 63 and conductor 59.

When a secondary apparatus, ste l-l 53, is position 58 and its magnet Iis energised by the her-it impulse, the pin 36 on the dog 29 enters thenotch 35 in disc 32 and operates the lever 58. This 1 closes contacts 52and 53 which complete the cirll cult from the line through the windingor" relay 9.

Relay is operated lay the current impulse and at contacts 58 and 56seems the circuit to the secondary magnet l which releases and advancesthe secondary apparatus into position 59. The release of l also openscontacts 52 5 and, 53, thereby opening the original operating circuit ofThis relay, however,

is now held. cpe'l ed over its locking circuit including contacts 553and 50 which were closed when the relay 3 operated, Relay" 8 is heldoperlo ated by the wee, c rent maintained on the line during the syncmisting period as explained in connection with cre 1,

Slow apparatl W apparatus on time, such as 533, will continue o operatedby the regular minute "impulses a lay the rapid ac celera'mg impel" romthe master cloc splashed. hen reaches pos ion cezlves the succeedingimpulse,

contacts 52 ,J are bring about the opera of rel 9, the cleel izatlcn ofthe 1 a: Y of the appaiiuo 12W. Q contacs ll of the up of relay a ow in"ore 2 master cloolz are 1enological a" operatand means cons all of c -aielay for maincllh means in operated l a secondas apparatus for use in atime controlled system, clack mechanism, an operating magnet foradvancing said mechanism, a relay for opening the circuit of saidmagnet, means controlled by said magnet and operative only armature, arelay, contacts controlled directly by said armature and operative onlyupon energize.- tion of said magnet when said apparatus is in apredetermined chronological position for completing an operating circuitfor said relay, and means controlled by said relay for opening thecircuit to said magnet and for closing a locking circuit to hold saidrelay operated when said contacts are opened by the deenergization ofsaid magnet.

6. In a corrective time controlled system, master apparatus andsecondary apparatus connected by a two-wire control circuit, anoperating magnet in said secondary apparatus connected to said circuit,means in said master apparatus for transmitting regular operatingimpulses and rapid accelerating impulses over said circuit to operatesaid magnet to advance said secondary apparatus, means effective whensaid secondary ape p-aratus reaches a predetermined chronologicalposition for preventing continued advance thereof, and means in saidmaster apparatus for transmitting a sustained relatively weak currentover said circuit to said secondary apparatus to maintain said lastmeans effective.

7. In a corrective time controlled system, master apparatus andsecondary apparatus connected by a two-wire control circuit, clockmechanism in said secondary apparatus, means in said secondary apparatusresponsive to impulses transmitted from said master apparatus over saidcircuit for advancing said clock mechanism, means for preventingcontinued advance of said mechanism when it reaches a predeterminedchronological position, and other means operated by said masterapparatus over said circuit to maintain said preventing means efiective,said maintaining means being released when said master apparatus reachesa corresponding chronological position to again permit advance of saidclock mechanism by received impulses. V

8. A corrective arrangement for a time controlled system comprisingmaster apparatus and secondary apparatus connected by a control circuit,means in said master apparatus for transmitting normal operatingimpulses and rapid accelerating impulses over said circuit and fortransmitting a relatively weak sustained current,

thereover for a period during which a plurality of said normal impulsesand all of said accelerating impulsesare transmitted, means in thesecondary apparatus for periodically preventing continued advancethereof at a predetermined point in its cycle of operation, and meanscontrolled by said sustained current for maintaining said last meanseffective.

9. In a corrective time controlled system, master apparatus andsecondary apparatus connected by a two-wire control circuit, means foradvanc ing said secondary apparatus responsive to impulses transmittedover said control circuit from said master apparatus, means forpreventing continued advance of said secondary apparatus when it reachesa predetermined chronological position, holding means for maintainingsaid last-named means effective, and means in said master apparatus fortransmitting a relatively I weak current over said control circuit tosaid secondary apparatus to maintain said holding ineans in operativeposition until said master apparatus reaches a correspondingchronological position.

10. In a master clock for use in a corrective time controlled system, anoutgoing two-wire con- 'trol circuit, means for transmitting normaloperating impulses over said circuit at one rate, means for transmittinga number of accelerating impulses over said circuit at a greater rate,and means for transmitting a sustained relatively weal; current impulseover said circuit during the time a plurality of said normal impulsesand all of said accelerating impulses are transmitted.

11; In a master clock for use in a corrective time controlled system, anoutgoing two-wire control circuit, means for transmitting over saidcircuit a plurality of normal operating impulses at regular intervals,means for transmitting a plurality of rapid accelerating impulses,during the interval between two ofsaid normal impulses, and means formaintaining in said circuit a relatively weak continuous current for aperiod during which a plurality of said normal impulses and all of saidaccelerating impulses are transmitted thereover.

12. In a master clock for use in a corrective time controlled system, anoutgoing control circuit, a source of current, a pair of contacts forconnecting said source of current to said circult, means for closingsaid contacts to transmit a series of normal operating impulses atregular

